E. Jefferson Clay was just one of many pseudonyms used by New South Wales-born Paul Wheelahan (1930-2018). Starting off as a comic-book writer/illustrator, Paul created The Panther and The Raven before moving on to a long and distinguished career as a western writer. Under the names Emerson Dodge, Brett McKinley, E. Jefferson Clay, Ben Jefferson and others, he penned more than 800 westerns and could, at his height, turn out a full-length western in just four days.
You can read more about Paul here.